Reenforced concrete pipe and the like



Oct. 13, 1 931. J. c. SCHULZE ET AL 1,827,620

REENFORCED CONCRETE PIPE AND THE LIKE Filed Feb. 27, 1929 WITNESSES .fdl l f l z 2 25% I 9 9 ATTORNEY Patented Oct. 13, 1931 UNITED STATES PATENT OFFICE JOHN C. SOHULZE, OF CROTON-ON-HUDSON, NEW YORK, AND GEORG WILI-IEL'M EGERER, OF WESTWOOD. NEW JERSEY REENFORCED CONCRETE PIPE AND THE LIKE Application filed. February 27, 1929.

This invention relates to reenforced concrete pipes.

An object of the invention is to construct a pipe or other device of concrete having a perforated or meshed reenforcement embedded therein, the reenforcement comprising a plurality of spaced convolutions with the concrete at opposite sides thereof.

A concrete pipe subject to pressure will receive compressive or tensional stresses at longitudinal sections.

It is a known and established fact that concrete has a much smaller strength in tension than steel and, therefore, at the present time it is the standard practice to lead all compressive stresses into the concrete and all tensional stresses into the steel reenforcing.

This reenforcing is usually composed of comparatively heavy rods and is placed either only near the inside of the pipe wall or near both the inside and the outside.

It is obvious that if a section receives tensional stresses over the entire area and only a part of this area is reenforced then the unreenforced portion of the concrete wall is liable to receive too great tensional stresses.

This new arrangement uniformly penetrates the entire pipe wall with a thin and closely spaced wire mesh laid spirally.

The bond between the reenforcing steel and concrete is thereby multiplied as against the usual method of reenforcing.

Therefore at sections where tensional stresses exist a more uniform distribution of these stresses is procured, also a much smaller amount of deformation will result.

At sections where compressive stresses exist thick rods are liable to buckle out and destroy the concrete cover. In the new arrangement this buckling tendency is practically eliminated.

Both the concrete and the steel arranged in the proposed manner form a working unit which will reach a much greater degree of Serial No. 343,169.

effectiveness than is possible with the present method.

lVith these and other objects in View, the invention consists in certain novel features of construction and combinations and arrangements of parts which will be more fully hereinafter described and pointed out in the claim.

In the accompanying drawings Figure l is a View in transverse section through a pipe embodying our invention;

Figure 2 is a view, mainly in side elevation of a pipe embodying our invention, showing one end of the pipe in longitudinal section and a portion of the inner surface broken away illustrating the reenforcement.

Referring more particularly to Figures 1 and 2 of the drawings, 1 represents our improved pipe which is composed mainly of concrete and in which a wire mesh reenforcement 2 is embedded.

This reenforcement is commonly known in the trade as steel, distinguishing it from concrete, but we preferably employ a wire mesh which may be of any suitable material and which may be coiled or spirally wound with the intermediate convolutions spaced from each other, and the inner and outer convolutions of general cylindrical form spaced from the inner and outer surfaces of the pipe, as clearly shown in Figure 1 of the drawings.

It is this broad idea of a concrete construction wherein a wall or a portion of a wall is formed by spaced coils or convolutions of a perforated reenforcement such as a wire mesh which is embedded in the concrete, which we desire to cover by a patent.

Furthermore. we have illustrated the construction as of cylindrical form and it is altogether within the scope of the invention to provide a device of any shape desired.

Various changes and alterations might be made in the general form of the parts described without departing from our invention and hence we do not limit ourselves to the exact details set forth but consider ourselves at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claim.

We claim: 7

A reenforced concrete pipe comprising a hollow cylinder of concrete, a self-contained core formed of 'a plurality of contiguous windings of a mesh-like reenforcement and embedded in the wall of the cylinder, the concrete impregnating the openings of the mesh and bondin together the adjacent windings of the reent orcement. V

7 JOHN C. SCHULZE. V

GEORG WILHELM EGERER. 

